Grinding-machine.



l' w.I H. namens.

GRINDING MACHINE. y

lApplimtion led Mur. 7, 1902.'|

Y (No Model.)

A TTOHNEYS v UNITED STATES wmLiAM y'HENRY- rnrrnns, osYoAMoRi-z, oHro. i

PAT-ENT F F .191,13*

sPEcIFIcATI'oN affirming-part f Lettersnecesaria-7023er, a'teciuune 17, 1902.

l A-pplioationiihle(llliarchjh'l902.I Seria1No.97,090; 4(No modelr) To all whom; it may concern:

, Be it known-that LW-IIZLIM HENRY FET- TERS, a citizen fof the United States, and a resident of Sycamore, inthe county of Wy- 5 andot and State of Ohio, have invented' a new and Improved Grinding-lvlachine, ofwhich the following is alfull, clear," and exactde- This invention relates particularly-to im- 1 o provements in machines'for grinding orrsharpening lawn-mower blades; and the object is to provide a machine of simple construction by means of which theblades may be quickly and accurately ground Without removing the same I 5 from the mowing-machine.

I will describe a grinding-machine embodying my invention andthen poin't out the novel features in'the appended claims.

Reference is to be .hadito the accompanying l2o drawings, forming a part of this speciiication,

in which similar characters of reference indicate corresponding parts'l in all the gres.

Figure 1 is a front elevation of a grindingmachine embodyingmy invention. z. Figgj 2 is z 5 a section on the line 2 2 of Fig. `1.

'4o nuts. A feeding-shaftllO'has'bearingsin the upper portion of the main frame. This feeding-shaft is'screw-threaded, and upon one end thereof is a sprocket-wheel 11, from which a chain 12 extends to a sprocket-Wheello on 45 the hub of a driving-Wheel14. Arranged below the feeding-shaft is the grinding-wheelcarrying shaft 15, which has bearings in boxes 16, mounted to slide in the frame. To provide for a yielding sliding movement of these 5o boxes, bolts 17 are extended therefrom 4through openings in lugs on the frames 5 and 6, and on the outerfends of these bolts are d n Eig. Sis a section on the lineB 3`ofFig. 1, and'FigJ.

The machine comprises endframes 5 6, inuj springs 18, which bear against thexlugs of the frameat one end and at the other end against nuts on"`the,bolts. p

Mounted-'on the rshaftA 15-.is the grindingwheel, consisting of emery or other suitable material. This Wheel 19 is designed to ronal movement thereon. Therefore the shaft iswprovidedwithy aflongitudinal channel 20, in which a feather on 'the Wheel-hub engages.

Operated by the shaft l0 is-a device for moving the wheel 19 longitudinally of the shaft 20. This device consists of a sleeve 2l, to vwhich is attached a spring 22, and from this 'spring a pin 23 extends through an openingin the sleeve and-engages with the'thread of the jshaft lO.2 Extended: downward:I from thesleeve 2l is an arm 24,"which at' its lower end'has connectionwithf'a ring arranged in anjarfnular channel l'forinediilrtle hub of the Wheel 19.- Ca'rriedbyithis arm`24i's'a! guidearm'25 for engagingwith the blade. This guide-arm 25 is *adjustablyconneeted to the ,arm24tby means ofa set-bolt 26, which passes through a slotin the guide-arm and through 1an opening intheV arm 24. lThe end of the arm25is designed to-'en'gage with one side 'of'j'a'lawn-mower;bladejand arranged to en- 'gagewiththe opposite "side thereof is a iin- :much faster than the rotary motion of the shaft 10.

In operation the lawn-mower is-,tofbe supported on the adjustable frame, asindicated by dotted lines in'Fig. 2, anda blade arranged against the grinding-stone, which at this time will be at the left-hand end of the machine.

As before stated, the end ofthe arm 25 will engage against one side of the blade While the iin ger 27 engages against the other side. This 4willcause the blade to be held closely against the stone or grinding-Wheel during the movements of the wheel lengthwise of the blade,

it being understood that the blades are spirally disposed. Upon turning the shafts the screw-shaft lO will move the sleeve 2l lengthwise, and consequently will move the grinding-wheel 19 lengthwise of the shaft 15 during its rotary movement. Upon reaching the end the pin 23 may be moved out of engagement with the shaft lO, so that the sleeve 21 and the grinding-wheel may be quickly moved to the opposite end for grinding the next blade of the series.

Having thus described my invention, I claim as new and desire to secure by Letters Patentl. A grinding-machine comprising a shaft, a grinding-wheel mounted to rotate with said shaft and to move longitudinally thereof, a feeding-shaft provided with a screw-thread, a sleeve movable on said feeding-shaft, a spring-pressed pin carried by the sleeve for engaging with the screw-thread, and a connection between said sleeve and the grinding-wheel, substantially as specified.

2. A grinding-machine comprising a shaft, a grinding-wheel mounted to rotate with said shaft and movable longitudinally thereof, a threaded feeding-shaft, a sleeve mounted on said feeding-shaft and operated by the thread thereof, a connection between said shaft and the grinding-Wheel, an arm carried by said connection, and a spring-pressed finger pivoted to the arm, substantially as specified.

A grinding-machine comprising a main frame, a shaft, spring-pressed boxes in said frame and in which the shaft has bearings, a grinding-wheel mounted to rotate with said shaft and having a longitudinal movement thereof, a screw-shaft having bearings in the frame, a sleeve on said screw-shaft, a springpressed pin carried by said sleeve and engaging with the thread of the screw-shaft, an arm extended from said sleeve and having engagement with the hub of the grinding-wheel, a guide carried by said arm, and an adjustable frame in the lower portion of the main frame, substantially as specified.

4:. A grinding-machine comprising a main frame, a shaft having bearings in said main frame, a grinding-wheel mounted to rotate with said shaft and having a longitudinal movement thereof, a screw-shaft, a sleeve mounted on the screw-shaft and having connection with the grinding-wheel, a pin movable in the sleeve forengaging with the screwshaft and means for driving the two shafts, the first-named shaft having a faster movement than the screw-shaft, substantially as specified.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

WILLIAM HENRY FETTERS.

Witnesses:

OSCAR ZUCK, GEO. A. KLAHR. 

